What is the resistance, under normal working conditions, of an electric lamp rated '240 V, 60 W'? If two such lamps are connected in series across a 240 V mains supply, explain why each one appears less bright
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The answer is 960 ohm
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Answer:
R = 960 ohm
Explanation:
V = 240V P = 60W
P = V×V/R
60 = 240×240/R
R = 240×240/60
R = 960 ohm
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